Year	Number of
1990	5993.97
1991	5966.98
1992	5969.3
1993	6000.75
1994	6009.94
1995	6022.76
1996	6002.7
1997	5961.66
1998	5947.71
1999	5987.12
2000	5982.74
2001	5979.14
2002	5980.26
2003	5976.23
2004	5951.69
2005	5978.69
2006	6018.59
2007	6046.95
2008	6088.81
2009	6123.75
2010	6186.17
2011	6290.04
2012	6386.72
2013	6526.17
2014	6640.49
2015	6732.84
2016	6835.49